If an accent mark is required, it MUST be there or your verb will be marked wrong.

being it = trŠelo
don't = no lo traigas

If the verb is regular, use the 3rd person singular: ťl lo trae = statement but trŠelo = bring it = command

The negative will use the "yo" form as the root with the "opposite vowel" meaning an -ar verb uses "e" while an "er" or "ir" verb use "a."
hablar = habla/no hables
comer = come / no comas
vivir = vive / no vivas